Allah hates anything of evil or bad things. The term hate was mentioned in the Quran in relation to the acts of hypocrites (9:46.)
It is His wisdom the Almighty to create Satan and make him the real test for humans to see who among us will stand next to the truth by Allah the Almighty or who will stand next to falsehood by Satan. Life is a test and our test is to keep close to the truth and stay away from evil.
Hating Satan, Kufr, bad deeds, evil actions or any sort of wrong doing is something normal to any Muslim. Allah the Almighty said in the Quran: “and He made Kufr, wrong doings and disobedience” 49:7. But I agree, as you said, one should focus more on how to do good deeds and be busy worshipng Allah the Almighty.
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